FHWA is currently working with the AASHTO T-15 committee
to update relevant sections of the LRFD design and construction specifications to better align with the industry standard of practice.
In addition, FHWA is working to address gaps in recommended guidance for drilled shaft foundations. This presentation will discuss
big picture items currently being worked on as part of the continued
improvement of the Drilled Shaft Foundation Program.

This presentation will provide an introduction to drilled shaft construction, including dry, wet, and casing methods. In addition,recent developments in construction techniques, with emphasis on methods applicable to conditions in the Rocky Mountain area will
be presented.

Drilled shaft techniques and equipment are often dependent on the region’s unique conditions. Commonly utilized equipment for lightly loaded and larger static structures, bridge and infrastructure, and power line and wind tower foundations will be reviewed. Drilled shaft tooling with applications used in the region will be discussed.

A drilled shaft is a reinforced concrete structural component that is constructed under conditions that are often quite challenging.
This presentation will describe key components to achieving quality in drilled shaft construction practice with respect to structural integrity
of the completed structure. The key factors include attention to details in completing the excavation, in the concrete placement operations, and in the mix design.

This presentation will provide a primer on LRFD design of drilled shafts, including an overall approach to the design of drilled shafts using LRFD methodology; methods for computing axial resistance; and design for lateral loading. Design of drilled shafts in weak rock formations of the Colorado Front Range will be reviewed. Examples will be used to illustrate design methods.

Two separate Colorado projects will be presented. One project involves the construction of drilled shafts using a post-construction, pressure-grouting method in an attempt to increase end-bearing resistance.
The second project uses a high strain, dynamic load test
to evaluate side shear and end-bearing resistance of one sacrificial and three production drilled shafts. The presentation will describe the local subsurface conditions, the general design approach of the
drilled shafts, the base grouting and dynamic testing procedures, measurements, and analysis of the results. Comparison of the test results with the design will also be discussed as well as the use of the data with AASHTO’s Load-Resistance Factor Design (LRFD)
methodology.

The presentation will summarize the research effort being funded by FHWA to synthesize the state-of-the-practice, and to investigate issues and conditions that most affect the performance of postgrouted drilled shafts used in transportation applications. Moreover, the current state-of-the-practice for the post-grouting of drilled shafts will be presented; gaps in current recommended technical guidance will be highlighted; and areas where the application of this technology will benefit from the proposed research will be identified.

Extensive testing and analysis of the performance of deep foundations in general, and bored piles in particular, has confirmed that engineers have difficulty in coming to grips with the many risks and uncertainties that exist when designing and constructing such foundations. This presentation will illustrate how we, as engineers and constructors, can improve the quality of deep foundations, while mitigating risk and lowering their overall cost by focusing on certainty.

Load testing technology has been taken to a new level with the advent of more contemporary methods. As a result, more testing is being performed. Huge volumes of test data have led to improvements in design and construction techniques. On occasion, though, the benefits of a load testing program can be quite surprising. The presentation will include some brief case histories demonstrating the ever present need for load testing. The case histories revolve around: 1) design; 2) variable soil conditions; 3) construction methods; and 4) materials quality control.

Dynamic testing of drilled shafts under the controlled impacts of a falling mass (e.g., the APPLE system) provides information regarding structural integrity and geotechnical load bearing capacity. The test can be engineered so that the loading subjects both the shaft and the geo-material to what is expected under service and required ultimate conditions, and, therefore, provides economical, reliable, and quick quality assurance for acceptable foundation performance.

This lecture has been established in honor of Dr. Jorj Osterberg, inventor of the Osterberg Cell, through the support of Loadtest Inc. The title of the lecture and honored presenter will be announced via email and on DFI’s website, www.dfi.org. Dinner sponsorships are 100% tax deductible and tickets are deductible less fair market value. If you would like to sponsor this dinner please contact DFI headquarters at 973-423-4030 or staff@dfi.org or complete the sponsorship section of the invitation and return to DFI.

This presentation focuses on downhole and surface techniques used for condition assessment of drilled shaft foundations. These techniques include Crosshole Sonic Logging (CSL), Crosshole Tomography (CT) and Sonic Echo/Impulse Response (SE/IR) methods.Using the CSL method, the velocity of the sound wave, which travels from source to receiver in a horizontal plane, determines the presence of anomalous regions and, therefore, the quality of the concrete. For added higher resolution of shaft integrity and defects, the CT velocity imaging method is used, which accurately and precisely defines the size, shape, severity, depth, and location of potential defects by determining the spatial velocity distribution of shaft concrete through analysis of numerous sound wave ray paths.

The construction of a 136-mile long monopole transmission project between Downey, Idaho and Salt Lake City, Utah included the construction of more than 900 large diameter drilled shafts. The alignment went through some of the most challenging ground conditions in North America, with extensive deep, soft clays and high artesian pressures. This case study presentation will include problems and defects that occurred, destructive and non-destructive testing and evaluation, and corrective actions.

Drilled shaft foundations with embedded heat exchangers (i.e., energy foundations) have gained attention by employing materials to not only provide structural support but also improve the energy efficiency of heat pump systems. Data on the thermal and mechanical performance of energy foundations obtained through analysis, field-testing, and centrifuge modeling will be summarized in this presentation. Focus will be provided on the modification and validation of soil-structure interaction analyses needed to predict thermally-induced movements and changes in ultimate capacity. Relevant issues to consider in the design and construction of energy foundations will also be discussed, along with methods to define material properties for analysis.

At mile marker 212, the pavement for I-70 in Colorado exhibits several inches of settlement on an annual basis, which has continued for more than 20 years, and is related to a large landslide. Geotechnical explorations within the slide mass have identified loose soils and potential voids below the asphalt roadway. Until funds for the permanent repair are available (likely cost over $10M), CDOT developed an interim low cost approach that also minimizes disturbance to traffic. In 2010, CDOT drilled 135 shafts to a maximum depth of 20 feet in the westbound lanes and placed lightweight cellular concrete. The cellular concrete also provided a means to fillvoid spaces below the asphalt. Presently, a similar project is in progress for the eastbound lanes. This presentation will review the use of lightweight cellular concrete in drilled shafts to mitigate roadway settlement at this location.

Analyses of the landslide incorporating resistance provided by the drilled shafts will be discussed. Specific attention will focus on determining drilled shaft loading, resolving forces in the drilled shafts, and sizing of the drilled shafts. Further, the construction and performance of the system will be presented.

12:15 pm

Depart for Field Day

12:30 pm - 4:00 pm

Lunch & Field Day at Host Facility (Williams Form Engineering)

Field Demo at Host Facility – Williams Form Engineering

The Field Day will consist of lectures and demonstrations regarding geo-exploration, drilled shaft tooling & installation, and nondestructive testing. A prediction contest with cash prize will be held using small diameter shafts to determine skin friction. The winner will be announced by the end of the day as well as published in Foundation Drilling magazine.

4:15 pm

Return to Hotel

Presenter Bios

Dan Brown Ph.D.P.E., D.GEDan Brown and Associates, PCDr. Brown is recognized as one of America’s leading authorities on the construction and design of deep foundations for transportation structures. After 22 years on the faculty at Auburn University, Dr. Brown remains active in deep foundation practice through his consulting firm, Dan Brown and Associates. He is an honorary member of ADSC and recipient of the 1994 ADSC Outstanding Service Award. He is a trustee of the Deep Foundations Institute, past chair of the Geo-Institute Deep Foundations Committee, a current member of Transportation Research Board Committee AFS30.

John Hart P.E., D.GECTL | Thompson, Inc.John Hart, P.E., D.GE CTL | Thompson, Inc, Denver, CO
John H. Hart is an Associate Engineer with CTL | Thompson, Inc., a geotechnical consulting firm located in Denver, Colorado. John received his BS and MS in Civil Engineering from West Virginia University and is a licensed professional engineer in six states within the Rocky Mountain region. He has 15 years of practical experience in geotechnical engineering with an emphasis on soil-structure interaction. John designed a variety of earth retention and deep foundation systems while with Coggins and Sons, Inc., a design-build contractor in Littleton, Colorado. He is a member of: ADSC, ASCE, Academy of Geo-professionals, CAGE (Colorado Association of Geotechnical Engineers), and DFI.

Thomas P. HartBlack & Veatch CorporationMr. Hart has over 23 years of experience in geotechnical design and construction management. The first half of his career was spent working in the field, inspecting heavy civil projects. After joining B&V Energy Division in 2001, Mr. Hart has focused on power development projects. He holds Bachelors and Masters Degrees in Geological and Geotechnical engineering from the University of Missouri at Rolla and is a registered professional engineer in Missouri and Arkansas, and a registered geologist Missouri. He has authored papers on deep foundations in karst terrain, construction vibration and beneficial reuse of fly-ash. He is currently the Chairman of the DFI Drilled Shaft Committee.

Jack Hayes P.E.Loadtest, Inc.Jack Hayes, P.Eng., Loadtest, Inc., Gainesville, FL
Mr. Hayes has fifty years of geotechnical engineering and consulting experience acquired in the U.S., Canada, and Africa. He has carried out geotechnical investigations for over 4,000 projects comprising several multi-span river crossings, over 250 small-to-medium bridge sites, several major industrial plant sites, and over 800 miles of road construction. As one of the founders and president of Loadtest Inc., Mr. Hayes has been involved with all aspects of Osterberg Cell load testing, including project development, field assembly and installation, instrumentation, testing, and analysis. He has published numerous papers and articles relating to geotechnical engineering and deep foundation testing. Mr. Hayes is a graduate of Queens University, Kingston with a B.Sc. in Civil Engineering, and continued his post graduate studies in Soil Mechanics, obtaining the D.I.C. from Imperial College, London in 1962. He is a registered Professional Engineer, and a member of the ADSC, DFI, and ASCE.

Vincent JueChampion Equipment CompanyMr. Jue graduated from Harvey Mudd College with a BS in Engineering degree. He is Principal of Champion Equipment Co., a drilling tool manufacturer with over 45 years’ experience, Principal of a California construction contractor, and Vice President of Soilmec North America, a world leading ground engineering equipment manufacturer. He is a member of the Society of Manufacturing Engineers, American Society of Materials, American Subcontractors Association, as well as ADSC, ASCE, and DFI.

Paul R. Macklin P.E.Yeh and Associates, Inc.Mr. Macklin has over 25 years of experience in geotechnical engineering working for DOT’s, specialty geotechnical contractors and design consultants. His work experience is mostly with heavy highway and transit facilities involving foundations, earth retention and landslide mitigation. Mr. Macklin received his BS in Geology from the College of William and Mary in Williamsburg, Virginia and his MS in Civil Engineering (Geotechnical) from the University of Colorado at Denver. He is a Principal with Yeh and Associates, Inc., a member of ASCE and serves as treasurer of the Rocky Mountain Chapter of the ADSC.

Antonio Marinucci Ph.D., P.E., M.E.ADSCDr. Marinucci is ADSC-IAFD Director of Operations and has over ten years of experience working for a designbuild
geo-construction specialty contractor, a major general contractor, and geotechnical engineering firm in a variety of capacities including deep foundation and anchored earth retention design and project management. He has authored or coauthored over ten technical papers on design and construction applications, practical research, and legal issues relating to geotechnical engineering and the geo-construction industry.

John S. McCartney Ph.D., P.E.University of Colorado BoulderProfessor McCartney received a BSCE and MSCE degrees from the University of Colorado Boulder and a PhD degree in civil engineering from the University of Texas at Austin. He is a recipient of the NSF Faculty Early Development (CAREER) Award in 2011. He also received several research awards including Richard S. Ladd D18 Standards Development Award from ASTM in 2011 and the Young IGS Award from the International Geosynthetics Society in 2008. Dr. McCartney’s early research focused on geosynthetics clay liners and their frictional interaction with other materials, and on experimental and field testing work involving unsaturated materials including nonwoven geotextiles and geosynthetic capillary barriers.

Mike MuchardApplied Foundation TestingMr. Muchard is a Geotechnical Engineer with over 23 years in the deep foundation industry. In 1997, he, along with Mr. Donald Robertson, founded Applied Foundation Testing (AFT), which is most notably known for advancing the art and science of STATNAMIC Load Testing in the United States, but also performs a multitude of other specialty testing services. He is a licensed Professional Engineer in several States including Florida, New York, and Hawaii, and his practice encompasses projects all over the continental United States, Canada, South America, and the Caribbean. Mr. Muchard has extensive experience and is considered an expert in Instrumentation, STATNAMIC, dynamic, and Static load testing methods, and has nationally recognized expertise in Non-Destructive Test (NDT) methods. Having been responsible engineer on hundreds of projects involving driven piles and drilled shafts has resulted in his being selected for very special and challenging deep foundation projects. This experience has allowed him to play a key role in the pioneering of new technologies that have had positive influence on the foundation industry such as STATNAMIC® Load Testing, Smartpile® wireless dynamic pile testing, and Post Grouted Drilled Shafts. He has authored numerous technical engineering papers, and has made numerous lectures and technical presentations of his specialties.

Silas Nichols P.E.Federal Highway AdministrationSilas is a Principal Geotechnical Engineer in FHWA Office of Infrastructure Silas is responsible for providing leadership and direction for the Geotechnical program through technical guidance and policy Development, and coordination with industry and professional groups. Silas has a Bachelor’s Degree in Civil Engineering from Syracuse University and Master’s Degree in Geotechnical Engineering from Tuft’s University.

Frank Rausche Ph.D., P.E., D.GEPile Dynamics, Inc. Cleveland, OHFor the past 40+ years, Dr. Rausche has been researching and consulting in the field of deep foundation testing and analysis. A graduate of the University of Stuttgart, Germany and Case Western Reserve University, Cleveland, Ohio, he has been a key member of the research team which developed the Case Method of pile testing and the Pile Driving Analyzer® adding devices like the APPLE system, Pile Integrity Tester and other advanced hardware and software for deep foundation quality assurance. Now a principal with Pile Dynamics, a manufacturer of deep foundation test equipment, he has been managing GRL Engineers, Inc. for more almost 35 years, growing it into a well-known and respected nationally and internationally operating consulting firm.

Yajai Tinkey Ph.D., P.E.Olson EngineeringDr. Tinkey is currently a Vice President and an Associate of Olson Engineering. She has over 15 years of experience in internal condition assessment of structures especially bridge decks and foundations. She developed the software to perform non-destructive testing for drilled shaft foundations for Olson Engineering. She was a Principal Investigator in several research projects funded by the NCHRP-IDEA program.

John Turner Ph.D, P.E.Dan Brown & Associates, PCDr. Turner has B.S. degrees in geology and civil engineering, an M.S. degree in structural engineering, and received his Ph.D. in geotechnical engineering from Cornell University. Dr. Turner practiced as an engineering geologist for Herbert and Associates, Inc., 1976-1978 and has been on the faculty of civil engineering at the University of Wyoming since 1986. His areas of professional expertise include drilled shaft foundations, anchored retaining walls, and landslide stabilization. He is the author of 100+ technical papers and reports and has been a principal investigator on over 20 funded research projects. Dr. Turner is a co-author of the FHWA Drilled Shaft Design Manual and is the author of NCHRP Synthesis 360, “Rock-Socketed Shaft’s for Highway Structure Foundations.” He is a past chairman of the ASCE Committee on
Deep Foundations and is a recipient of the Outstanding Service Award (1992) and the President’s Award (2000) from the ADSC: The International Association of Foundation Drilling.

Mark Vessely P.E.Shannon & Wilson, Inc.Mr. Vessely has 18 years of geotechnical experience. Previously, Mark was a senior geotechnical engineer and resident engineer for Colorado DOT. Mark regularly manages geotechnical activities to support bridge construction, earth retention, landslides, and roadway widening. He has a BS degree in Geological Engineering, a MS degree in Civil Engineering and is past president of the Colorado Association of Geotechnical Engineers.